The Thin Man (1934)

In director W.S. Van Dyke's comedy-mystery - the first film of the very popular series:

• the wisecracking, sophisticated, witty, and clever exchanges between detective couple Nick (William Powell) and Nora Charles (Myrna Loy)
• the scene of Nora's noisy and sprawling entrance into a restaurant (a pratfall typical of screwball comedies) laden with Christmas packages and dragged by their dog Asta
• the sequence in their bedroom in which Nick punched out his wife to protect her from a gunman's line of fire
• Nick's scene with a pop/airgun shooting balloons off their Christmas tree
• the dinner party scene in which Nick invited all the suspects and step-by-step analyzed all the crimes and solved the mystery